Moved all interface headers into a 'wx' subdirectory for proper use of Doxygen path settings.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@54385 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

interface/wx/math.h

@@ -0,0 +1,28 @@
+/////////////////////////////////////////////////////////////////////////////
+// Name:        math.h
+// Purpose:     interface of global functions
+// Author:      wxWidgets team
+// RCS-ID:      $Id$
+// Licence:     wxWindows license
+/////////////////////////////////////////////////////////////////////////////
+
+/** @ingroup group_funcmacro_math */
+//@{
+
+/**
+    Returns a non-zero value if @a x is neither infinite nor NaN (not a
+    number), returns 0 otherwise.
+
+    @header{wx/math.h}
+*/
+int wxFinite(double x);
+
+/**
+    Returns a non-zero value if x is NaN (not a number), returns 0 otherwise.
+
+    @header{wx/math.h}
+*/
+bool wxIsNaN(double x);
+
+//@}
+